EP1512220A1 - Coordinate rotation of pre-distortion vector in feedforward linearization amplification system - Google Patents
Coordinate rotation of pre-distortion vector in feedforward linearization amplification systemInfo
- Publication number
- EP1512220A1 EP1512220A1 EP03730969A EP03730969A EP1512220A1 EP 1512220 A1 EP1512220 A1 EP 1512220A1 EP 03730969 A EP03730969 A EP 03730969A EP 03730969 A EP03730969 A EP 03730969A EP 1512220 A1 EP1512220 A1 EP 1512220A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- distortion
- vector
- multiplier
- coefficients
- modified
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
- H03F1/3229—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3282—Acting on the phase and the amplitude of the input signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3294—Acting on the real and imaginary components of the input signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
- H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
- H03F2201/3212—Using a control circuit to adjust amplitude and phase of a signal in a signal path
Definitions
- An amplifier system for radio frequency signals comprises a phase and gain adjuster which receives an input signal and a control vector for producing a distortion- adjusted input signal.
- the distortion-adjusted input signal is applied to a main amplifier which generates an amplified output signal.
- a control loop generates a control vector indicative of distortion of the main amplifier.
- a modified pre-distortion vector generator generates a modified pre-distortion vector which is combined with the control vector to produce a composite control vector.
- the composite control vector is applied to the phase and gain adjuster, thereby enabling the phase and gain adjuster to produce the distortion-adjusted input signal.
- the modified pre-distortion vector generator performs a vector multiplication (e.g., coordinate rotation) of a pre-distortion vector so that the resultant modified pre-distortion vector has a proper direction relative to the control vector.
- the amplifier system 120 of Fig. 5 comprises a phase and gain adjuster 122.
- Phase and gain adjuster 122 is connected, via coupler 124, to receive an input signal applied at point 121.
- phase and gain adjuster 122 On its output side phase and gain adjuster 122 is connected to an input side of main power amplifier 126.
- the output side of main power amplifier 126 is applied to coupler 128, and from one leg of coupler 128 via attenuator 130 to subtractor 132.
- the attenuator 130 reduces the gain of the signal output by main power amplifier 126 by an amount corresponding to the gain provided by main power amplifier 126.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US163643 | 2002-06-07 | ||
US10/163,643 US6680649B2 (en) | 2002-06-07 | 2002-06-07 | Coordinate rotation of pre-distortion vector in feedforward linearization amplification system |
PCT/SE2003/000898 WO2003105337A1 (en) | 2002-06-07 | 2003-06-03 | Coordinate rotation of pre-distortion vector in feedforward linearization amplification system |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1512220A1 true EP1512220A1 (en) | 2005-03-09 |
EP1512220B1 EP1512220B1 (en) | 2012-10-31 |
EP1512220B8 EP1512220B8 (en) | 2013-01-02 |
Family
ID=29710016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03730969A Expired - Lifetime EP1512220B8 (en) | 2002-06-07 | 2003-06-03 | Coordinate rotation of pre-distortion vector in feedforward linearization amplification system |
Country Status (4)
Country | Link |
---|---|
US (1) | US6680649B2 (en) |
EP (1) | EP1512220B8 (en) |
AU (1) | AU2003241244A1 (en) |
WO (1) | WO2003105337A1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6590449B2 (en) * | 2000-05-30 | 2003-07-08 | Matsushita Electric Industrial Co., Ltd. | Predistortion circuit, low-distortion power amplifier, and control methods therefor |
JP3986862B2 (en) * | 2002-03-28 | 2007-10-03 | 株式会社日立国際電気 | Amplifier |
FR2846812B1 (en) * | 2002-11-05 | 2005-01-28 | Eads Defence & Security Ntwk | IMPROVING THE METHODS AND DEVICES FOR LEARNING A DEVICE FOR LINEARIZING AN RF AMPLIFIER |
FR2846813B1 (en) * | 2002-11-05 | 2005-01-28 | Eads Defence & Security Ntwk | METHOD AND DEVICE FOR LEARNING A DEVICE FOR LINEARIZATION OF AN RF AMPLIFIER, AND MOBILE TERMINAL INCORPORATING SUCH A DEVICE |
US7075366B2 (en) * | 2003-07-18 | 2006-07-11 | Mks Instruments, Inc. | Methods and systems for stabilizing an amplifier |
US7639015B2 (en) * | 2003-07-18 | 2009-12-29 | Mks Instruments, Inc. | Methods and systems for stabilizing an amplifier |
US8461842B2 (en) * | 2003-07-18 | 2013-06-11 | Mks Instruments, Inc. | Methods and systems for stabilizing an amplifier |
US7113036B2 (en) * | 2004-04-15 | 2006-09-26 | Agere Systems Inc. | Method and apparatus for adaptive digital predistortion using nonlinear and feedback gain parameters |
US20060039498A1 (en) * | 2004-08-19 | 2006-02-23 | De Figueiredo Rui J P | Pre-distorter for orthogonal frequency division multiplexing systems and method of operating the same |
US8036240B2 (en) * | 2007-12-14 | 2011-10-11 | Microsoft Corporation | Software defined cognitive radio |
US7834688B2 (en) * | 2007-12-20 | 2010-11-16 | Nortel Networks Limited | Linearised power amplifier |
DE102008052172B4 (en) | 2008-10-17 | 2014-01-23 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device for generating a correction signal |
CN101567667B (en) * | 2009-04-24 | 2011-10-19 | 福建三元达通讯股份有限公司 | Enhancement type analog predistortion linear power amplifier |
US9077440B2 (en) * | 2013-01-04 | 2015-07-07 | Telefonaktiebolaget L M Ericsson (Publ) | Digital suppression of transmitter intermodulation in receiver |
CN106130961B (en) * | 2016-06-14 | 2019-05-14 | 哈尔滨工业大学 | Safety detection method and software radio for software radio system |
US11689166B2 (en) * | 2021-02-04 | 2023-06-27 | Analog Devices International Unlimited Company | Circuitry for reducing distortion over a wide frequency range |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5111155A (en) | 1991-03-04 | 1992-05-05 | Motorola, Inc. | Distortion compensation means and method |
JP2967699B2 (en) | 1995-03-06 | 1999-10-25 | 日本電気株式会社 | Transmission device |
US5770971A (en) * | 1996-07-26 | 1998-06-23 | Northern Telecom Limited | Distortion compensation control for a power amplifier |
US5898338A (en) | 1996-09-20 | 1999-04-27 | Spectrian | Adaptive digital predistortion linearization and feed-forward correction of RF power amplifier |
JP3106996B2 (en) | 1997-04-02 | 2000-11-06 | 日本電気株式会社 | Feed forward amplification circuit |
US6075411A (en) | 1997-12-22 | 2000-06-13 | Telefonaktiebolaget Lm Ericsson | Method and apparatus for wideband predistortion linearization |
US6188732B1 (en) | 1998-10-19 | 2001-02-13 | Samsung Electronics Co., Ltd. | Digital feedforward amplifier for use in an RF transmitter and method of operation |
DE69943380D1 (en) | 1999-07-28 | 2011-06-01 | Fujitsu Ltd | METHOD AND DEVICE FOR THE DISTORTION COMPENSATION OF A RADIO DEVICE |
SE519596C2 (en) | 1999-10-29 | 2003-03-18 | Ericsson Telefon Ab L M | Method and apparatus for controlling the phase of a linearized electronic amplifier |
JP2001230636A (en) * | 2000-02-16 | 2001-08-24 | Nec Corp | Feedforward amplifier circuit and its control method |
-
2002
- 2002-06-07 US US10/163,643 patent/US6680649B2/en not_active Expired - Lifetime
-
2003
- 2003-06-03 WO PCT/SE2003/000898 patent/WO2003105337A1/en not_active Application Discontinuation
- 2003-06-03 AU AU2003241244A patent/AU2003241244A1/en not_active Abandoned
- 2003-06-03 EP EP03730969A patent/EP1512220B8/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03105337A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU2003241244A1 (en) | 2003-12-22 |
EP1512220B1 (en) | 2012-10-31 |
US20030227324A1 (en) | 2003-12-11 |
US6680649B2 (en) | 2004-01-20 |
EP1512220B8 (en) | 2013-01-02 |
WO2003105337A1 (en) | 2003-12-18 |
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